Calculate the hydrogen ion concentration ([H^+]) from the target pH.

To solve this problem, we need to determine the concentration of the concentrated acetic acid solution, then calculate the required concentration of acetic acid in the final diluted solution to achieve the desired pH, and finally find the volume of the concentrated solution needed.

We will use the standard acid dissociation constant ($K_a$) for acetic acid ($CH_3COOH$), which is $1.8 \times 10^{-5}$.

Step 1: Calculate the hydrogen ion concentration ($[H^+]$) from the target pH.
The target pH is 3.25.

$$[H^+] = 10^{-pH}$$ $$[H^+] = 10^{-3.25}$$ $$$$