To determine how many \( \frac{4}{3} \) pint servings are in \( \frac{28}{3} \) pints of milk, you divide the total amount of milk by the size of one serving.
\[ \text{Number of servings} = \frac{\frac{28}{3}}{\frac{4}{3}} \]
To divide by a fraction, you can multiply by its reciprocal:
\[ \frac{28}{3} \div \frac{4}{3} = \frac{28}{3} \times \frac{3}{4} \]
Now, simplify this expression:
\[ = \frac{28 \times 3}{3 \times 4} = \frac{28}{4} = 7 \]
So, there are \( 7 \) servings of \( \frac{4}{3} \) pints in \( \frac{28}{3} \) pints of milk.
Therefore, the answer is 7 servings.