Looking at the billiard balls, you note their numbers and colors:
9 (Yellow stipe), 3 (Red), 5 (Orange), 7(Maroon), 6 (Green) and 8 (Black).
From the clue (dash), you wonder if there’s a phone number hidden here, but there’s only 6 numbered balls.
Unless you count the cue ball as zero. With that leap, you list the balls from furthest to closest (perspective) and get:
8 6 7 5 3 0 9
And this gives you your answer, from the hit song Jenny: 867-5309.