27T: Call river bet w/ QQ when over pairs?

[TruFloridaGator]

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 (t1715)
Hero (t1445)
MP2 (t920)
MP3 (t1090)
CO (t1095)
Button (t1610)
SB (t2795)
BB (t1375)
UTG (t1455)

Preflop: Hero is MP1 with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t150</font>, <font color="#666666">3 folds</font>, Button calls t150, <font color="#666666">2 folds</font>.

Flop: (t375) T[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t275</font>, Button calls t275.

Turn: (t925) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t250</font>, Hero calls t250.

River: (t1425) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t400</font>, Hero ?