Trips OOP in limped pot

[Zizz]

Poker Stars, $5 + $0.50 NL Hold'em Tournament, 15/30 Blinds, 9 Players
LeggoPoker.com - Hand History Converter

CO: 4,375
BTN: 2,545
SB: 3,035
Hero (BB): 2,575
UTG: 2,890
UTG+1: 740
UTG+2: 6,195
MP1: 4,195
MP2: 8,000

Pre-Flop: (45) 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] dealt to Hero (BB)
UTG calls 30, UTG+1 calls 30, UTG+2 calls 30, MP1 calls 30, MP2 calls 30, CO folds, BTN calls 30, SB calls 15, Hero checks

Flop: (240) 7[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] (8 Players)
SB checks, <font color="red">Hero bets 120</font>, 2 folds, UTG+2 calls 120, MP1 calls 120, MP2 folds, <font color="red">BTN raises to 750</font>, hero folds

The BTN had been playing very tight and hadn't showed down a hand yet. Nothing had stood out about UTG+1 up to this point and MP1 had been playing very loose and active. I saw him play a set OOP by check/calling the flop and turn against the preflop raiser and leading river with a small bet.

BTN could have 99-1010 but I'm not sure if he raises these over limpers preflop or not. I don't think he does this with a smaller pair. He could possibly have a lot of holdings with an 8 (86, 89, 810, J8) but he has been playing tight enough that I think he folds a lot of those preflop. The same goes for 79, 76, 710. It seems like he would have played 87, 88 slower but I didn't know enough about him.

UTG+1 and MP1 ranges are most likely small pairs, straight draws, or connectors with a 7 or 8.

I lead the flop for deception, building the pot and making draws pay. I folded because it seems like one of the players shows up with a 7 often and I can't continue in the hand to gain more information without commiting a lot of chips.

Let me know your thoughts on my play and analysis.