Flopped Bottom Set In Raised Pot

[Res-Judicata]

I have no history on the opponent, so just think of him as generic UB player. Is it profitable overall to release any set, even bottom set, when you have no read on the player and he's playing back strong? Also, any thoughts on flop check-raise are appreciated as well.

Ultimate Bet No-Limit Hold'em, $.50 BB (9 handed) FTR converter on zerodivide.cx

MP1 :#A500AF(Villian)/ ($89.45)
MP2 ($10.15)
MP3 ($58.35)
CO ($43.65)
Button ($14.75)
SB ($28.25)
BB ($49.75)
Hero ($111.85)
UTG+1 ($42.60)

Preflop: Hero is UTG with 7[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img].
Hero calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">MP1 :#A500AF(Villian)/ raises to $2.25</font>, <font color="#666666">2 folds</font>, CO calls $2.25, <font color="#666666">1 fold</font>, SB calls $2, <font color="#666666">1 fold</font>, Hero calls $1.75.

Flop: ($9.50) T[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">Villian bets $3</font>, CO folds, SB calls $3, <font color="#CC3333">Hero raises to $12</font>, <font color="#CC3333">Villian raises to $43</font>,