To find the volume of a rectangular sink after a scale factor of 2 has been applied, you will need to know that because each of the 3 dimensions for volume would be double the original, you will need to multiply the original volume by 2 3 times.
1000 x 2 x 2 x 2 = 8000 cubic inches.
If the original dimensions were 10 x 10 x 10, then the new dimensions would be 20 x 20 x 20 which would be 8000 cubic inches.