Villain is 66/33 over 6 hands and hasn't been to show down so not much to go on.

Simple question........river sizing?

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) - PokerStars Converter Tool from FlopTurnRiver.com

Button ($3.55)
SB ($13.87)
BB ($17.49)
UTG ($16.36)
Hero (UTG+1) ($12.25)
MP1 ($9.40)
MP2 ($3.90)
MP3 ($4.05)
CO ($10.60)

Preflop: Hero is UTG+1 with Q, Q
1 fold, Hero bets $0.40, MP1 calls $0.40, 6 folds

Flop: ($0.95) Q, 7, K (2 players)
Hero bets $0.75, MP1 calls $0.75

Turn: ($2.45) 7 (2 players)
Hero bets $1.80, MP1 calls $1.80

River: ($6.05) 9 (2 players)
Hero bets??