I could use help with another book I'm writing.?

I just finished the outline for this book. It is a pirate novel, and I still need a title. The book is about the death of the pirate king and the race around the world in order to appoint a succesor. Captain Tom Silver is the favorite until he meets a daring young pirate who turns out to be the notorious female pirate, Anna Sweete. She has been given the task of delivering the pirate king's daughter. He travels with her so he can take the throne. Then, when it is revealed there is an heir, the two pirates team up by hiring an in who is hired by the Royal Navy. I need to know if it sounds different enough from Pirates of the Carribean because I want to avoid cliche. Thanks!