trips com decisao dificil river

Hand converted with online PokerStrategy.com hand converter:

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$0.02/$0.05 No-Limit Hold'em (5 handed)

Known players:
[tg]CO$5.31:///////;BU$5.49:///////;SB (Hero)$5.00:///////;BB$3.50:///////;MP3$6.90:///////;[/tg]

Preflop: Hero is SB with A:s, 7:s.
MP3 folds, CO raises to $0.15, BU calls $0.15, Hero calls $0.13, BB calls $0.10.

Flop: ($0.6) 4:s, 7:h, 2:c (4 players)
Hero checks, BB checks, CO checks, BU bets $0.30, Hero calls $0.30, BB folds, CO folds.

Turn: ($1.2) 7:d (2 players)
Hero checks, BU bets $0.90, Hero calls $0.90.

River: ($3) 6:h (2 players)
Hero checks, BU bets $2.88, Hero???
dei call pf pois minha mao é jogavel em pote multway e tinha um donk na BB tb!!
flp/turn acho standard!! e o river??