(39) 77 in position L5
 

Villain is 21/15, seems decent, nothing noteworthy.
This is a 6man STT, pays two spots. This is not the bubble.

PokerStars Tournament, Big Blind is t150 (4 handed) Converter on pregopoker.com

CO (t2540)
Hero (t2455)
SB (t1110)
BB (t2895)

Preflop: Hero is in Button with 7[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/diamond.gif[/img]
<font color="red">CO raises to t425</font>, Hero calls t425, <font color="gray">SB folds</font>, <font color="gray">BB folds</font>

Flop: (t1075) J[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] (2 players)
CO checks, Hero...

Re: (39) 77 in position L5
 

I don't think he's gonna fold to a flop bet with any reasonable holdings. I'd check behind and try to take it away on turn if he checks again.....Otherwise just fold.

Re: (39) 77 in position L5
 

Normally I'd just fold this pre-flop, TT+ or AK I would shove

Re: (39) 77 in position L5
 

marginal.
You are calling off 20% of your stack for... well... set value? If you don't know what to do on this flop, I think you hoped for a board of undercards?!
I'd go for Crash's line once you made the call and it is checked to you, hoping the turn bricks.
Trying to take it down on the flop is maybe a bit risky depending on villain. Raising pf and checking on a board that should have hit his range is somewhat suspicious.