Borgata NL 2/5 - Flop jointed straight in limped pot

[jenson]

Saturday night at Borgata. NL 2/5, about half of the players have at least $800 stacks. I just sat down and this is my first hand. I don't frequent Borgata and don't know any of these players.

I'm in the BB with 8 5 offsuit (I don't remember the suits). I have $450 behind.

Several players limp, don't remember exactly how many but probably fix or six limpers. I check my BB.

Flop comes 6 7 9 rainbow.

I check. MP player bets $25. Late position player raises to $75. Action is back to me. What should I do?

Sorry I don't remeber the suits, but since the flop was a rainbow, I don't think it is too relevant.