Pina Colada Pie

1 (8 ounce) can cream of coconut
1 can sweetened condensed milk
1 (15 1/2 ounce) can crushed pineapple, drained
1 (9 ounce) carton frozen whipped topping
1/4 cup light rum or 1 teaspoon rum flavoring
2 graham cracker pie shells

Blend first 5 ingredients and pour into pie shells. Freeze. Remove from freezer about 20 minutes before serving.