Villain is 40/12 for 35 hands. Should you valuebet this river?

Full Tilt No-Limit Hold'em, $0.25 BB (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

MP3 ($12.05)
Hero (CO) ($29.10)
Button ($4.65)
SB ($25)
BB ($25.05)
UTG ($25)
UTG+1 ($5)
MP1 ($23.90)
MP2 ($7.25)

Preflop: Hero is CO with 6, 6
5 folds, Hero raises to $0.85, 2 folds, BB calls $0.60

Flop: ($1.80) 6, 5, 7 (3 players)
BB bets $1, Hero raises to $3, BB calls $2

Turn: ($7.80) A (3 players)
BB bets $4.50, Hero calls $4.50

River: ($16.80) Q (3 players)
BB checks, Hero ?,