QQ river decision OOP

[As armas]

Not many hands on Villain, did not see him do anything out of line though. Here I wasnt sure if I should bet or check fold. Does betting here usually get value from 77-JJ? Maybe even A6? If I do check here do I call a real bet? I feel like the above mensioned hands prob check it down, so a bet by villain puts his range more towards set/AA/KK/55/65.
Was kind of lost on this one, thanks for your imput...

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $99.00
BB: $114.10
UTG: $85.45
Hero (MP): $98.50
CO: $66.25
BTN: $95.40

Preflop: Hero is dealt Q[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img] (6 Players)
UTG calls $1.00, <font color="red">Hero raises to $4.50</font>, CO folds, BTN calls $4.50, 3 folds

Flop: ($11.50) 4[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $8.00</font>, BTN calls $8.00

Turn: ($27.50) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $20.00</font>, BTN calls $20.00

River: ($67.50) 2[img]/images/graemlins/club.gif[/img] (2 Players)
Hero ?