Opponent on SB is unknown player, what should do here preflop?
PokerStars, Hold'em No Limit - $0.02/$0.05 - 6 players
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UTG: $5.29 (106 bb)
MP: $5.16 (103 bb)
CO: $6.56 (131 bb)
BU: $9.45 (189 bb)
SB: $4.46 (89 bb)
BB (Hero): $5.11 (102 bb)
Pre-Flop: ($0.07) Hero is BB with J♦ J♥
3 players fold, BTN raises to $0.12, SB 3-bets to $0.45, Hero 4-bets to $1.20, 1 fold, SB 5-bets to $3, BB (Hero) ???