Orange Chocolate Chip Cheesecake

1 cup cocoa powder, preferably Dutch-processed
2 pounds cream cheese (regular or reduced fat), at room temperature
1 1/2 cups granulated sugar
2 tablespoons vanilla extract
2 teaspoons orange extract
1/4 cup orange liqueur
5 eggs
12 ounces mini chocolate chips

Preheat oven to 200 degrees F. Spray the interior of a 2-quart souffl