Don't worry, in terms of volume, 1 milliliter (mL) is equivalent to 1 cubic centimeter (cc), so you can use them interchangeably. Therefore, if your instructions specify a dosage in mL, you can use the same number for cc.
However, units can be a different story. Units are specific to the type of medication and can't be directly converted to mL or cc without knowing the specific concentration of the medication. If your syringe is marked in units and your dosage is in mL, you should contact your healthcare provider or pharmacist to ensure you're measuring the correct dose.