A 28-year-old man is brought to the trauma center with a gunshot wound to the abdomen. On arrival, he is hypotensive (BP 90/60 mmHg), tachycardic (HR 130/min), with a single entry wound in the right lower quadrant and no exit wound. Focused assessment with sonography for trauma (FAST) shows free fluid in the pelvis. What is the most appropriate next step in management?