If Shanks has you heading out to play with the Scallywags, then I have something for you to while you are there. They stole a shipment from some folks who would really like their goods returned.
While you are out there playing with the pirates, look around and see if you can find three iron bound chests. Those would be the goods that were stolen. Return them to me please.
Those are them, for sure. You have done more than you know, this day. I thank you. Good luck!