oh no, not that river.. what to do? (11's)

about the 5th hand, table is playing stupidly loose and passive preflop. preflop call is marginal, and i know it.

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

SB (t710)
BB (t660)
<font color="#C00000">Hero (t800)</font>
UTG+1 (t1315)
UTG+2 (t800)
MP1 (t690)
MP2 (t760)
MP3 (t775)
<font color="#C00000">CO (t765)</font>
Button (t725)

Preflop: Hero is UTG with 7[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img].
Hero calls t15, <font color="#666666">1 fold</font>, UTG+2 calls t15, <font color="#666666">3 folds</font>, CO calls t15, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (t72.50) 7[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets t40</font>, UTG+2 calls t40, CO calls t40, SB calls t40, BB calls t40.

Turn: (t272.50) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets t300</font>, UTG+2 folds, CO calls t300, SB folds, BB folds.

River: (t872.50) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

now what? we both have close to 400-450 behind