55 on the button, am I ok playing this flop?

[bozlax]

Read on Villan, based on fewer than 10 hands is that he's a typical LAG.

Party Poker 0.5/1 Hold'em (9 handed) converter

Preflop: Hero is Button with 5[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img]. UTG posts a blind of $0.75.
UTG (poster) checks, <font color="#666666">4 folds</font>, CO calls, Hero calls, <font color="#CC3333">SB <font color="#A500AF">(villan)</font> raises</font>, BB calls, UTG folds, CO calls, Hero calls.

Flop: (9.50 SB) 7[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
villan checks, BB checks, CO checks, <font color="#CC3333">Hero bets</font>, ...

Is it ok to bet out, here? I figure I've got a pocket pair, gutshot and backdoor flush outs, so it's probably a pretty strong hand with little cards flopped. Should I try to CR? Should I check and fold to a bet from Villan?