$11: Battle of the blinds. Folding tpnk to check-raise

I think that at $11's check-raise usually means a good hand. But this hand left me with a weak feeling..

Villain was a semi-loose.

Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (5 handed) FTR converter on zerodivide.cx

Button (t3325)
SB (t1000)
Hero (t790)
UTG (t795)
MP (t2090)

Preflop: Hero is BB with J[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, SB completes, Hero checks.

Flop: (t100) J[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t100</font>, <font color="#CC3333">SB raises to t200</font>, Hero folds.

Final Pot: t400