The word volcaré is the future form of volcar in the first person singular.
See the full volcar conjugation

volcar

No puedo sacar el cuerpo por la borda o volcaré el barco, y no sé nadar por lo que me tendrás que ayudar.
I can't move the body out of the boat, or I'll tip the boat, and I can't swim so you'll have to help me.
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