You can use either of the themes below, but I'm going to leave it to you to go back and find examples. (They're easy to find in both poems...)
The themes I found are STRENGTH and PRIDE. In both poems, she's very strong--she WILL NOT be intimidated, but tells the reader that THEY might be intimidated by that strength.
Maya didn't mess around. Her poems will smack you in the face and demand your attention. She was awesome.
Go dig into both poems and look for examples of those common ideas. You won't have to dig too far.
Enjoy, and good luck with the assignment.
Matt in New York